Test scoped subselects when using all

[elpete]

Closes #60

Issue review

Recommendation: 8/10 — preserve and test. .all() and .get() should hydrate the same selected fields; differing behavior is surprising and breaks substitutability. The only downside is a small additional integration test.

Reproduction note

The reported failure could not be reproduced on current next with qb@14.0.0-beta.3. A withLatestPostId() scope followed by .all() hydrates the subselected virtual attribute correctly and executes one query.

Implementation

• adds a public-API regression for a scoped subselect followed by .all()
• asserts the full collection is returned
• asserts the projected value is available from the hydrated entity getter
• asserts only one database query is executed

Validation

• focused SubqueriesSpec: 12 passed, 0 failed, 0 errors
• full Lucee 6 suite: 496 passed, 0 failed, 0 errors, 3 skipped
• box run-script format
• git diff --check

Uses qb@14.0.0-beta.3.